The existence of what was conjectured by Russian mathematician Vladimir Arnold in 1995 and proven in 2006 by Hungarian scientists Gábor Domokos and Péter Várkonyi?
Gömböc, a type of convex 3 dimensional body A Gömböc is a convex three-dimensional homogeneous body which, when resting on a flat surface, has just one stable and one unstable point of equilibrium.
In February 2022 Russian President Vladimir Putin was suspended from his position as honorary president and Ambassador of what organisation?